Regression causing Freeze in KWin 4.9.1

Martin Gräßlin mgraesslin at
Tue Sep 4 20:41:10 UTC 2012

Hi KDE Packagers,

unfortunately we have introduced a nasty regression while fixing a bug in KWin 
for 4.9.1 [1]. With the "wrong" settings and the wrong set of open windows 
distributed over multiple desktops this can result in a freeze.

A freeze in KWin means that the compositor stops, that is the user has no 
chance to recover from this state unless he knows how to switch to a tty.

In case you have not yet pushed out updates for kde-workspace I would kindly 
ask you to hold them off till we have a working and regression free fix. A 
patch is already attached to the bug, but I want to give it more time for 
testing tomorrow.

As an alternative you could also revert git commit 
567f8cc50082ce5307aa7163fdf3176446a1df5a which introduced the regression.

I will keep you informed when the patch has been committed to the branch.

Sorry for the inconvenience.

Kind Regards
Martin Gräßlin

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